Paper-making machine



Aug. 11, 1925. 7 1,549,338

J. D. TOMPKINE PAPER MAKING MACHI NE Filed April 11, i

Patent Aug. ii, 1e25 JOHN D. TOMJPKINS, F VALATIE, NEW YORK.

PAPER-MAKING MACHINE.

Application filed April 11, 1922. Serial No. 551,575.

To all whom it mayconcem:

Be it known that 1, JOHN D. TOMPKINS, a citizen of the United States, aresident of Valatie, in the county of Columbia and State of New York,have invented a certain new and useful Paper-Making Machine, of whichthe following is a specification.

The'invention has for an object to facilifate or improve the operationof extracting water from the fibers of a paper web as it passes througha paper making machine, particularly at the time when such fibers arecarried by the forming wire, and in such manner that the removal ofwater or moisture from the fibers will not displace the same from properposition.

Another object of the invention is to utilize the step of removing wateror moisture as above mentioned, to assist in causing the web to adhereproperly to the felt which is relied upon to carry the web along toparts of the machine which are to perform further operations thereon.

Other objects and advantages of the invention will be in part obviousand in part specifically pointed out in the description hereinaftercontained, which, taken in connection with the accompanying drawings,discloses a preferred embodiment thereof; such embodiment, however, isto be considered merely as illustrative of its principle. In thedrawings I The single gure is a diagrammatic vertical longitudinalsection showlng a paper from the press rolls to the first ro makingmachine adapted to operate in accordance with the invention.

Referring to the drawing, the particular type of paper making machineillustrated, embodies a paper web forming means, comprising a formingwire 1 running over a plu-.

rality of small rolls 2, and around a lower couch roll 3. The newlyformed paper web 4 is carried in the first instance upon form- 7 ingwire 1, and is transferred therefrom to a felt apron 5, in the presentinstance the upper felt apron, which latter is pressed intoengagementwith the paper web 4 by means of an upper couch roll 6; the upper feltapron passes between upper and lower pres rolls 7 and 8 respectively,and as shown also serves to carry the palper web 9 of a series ofdryers, by passing around a roller 10 which presses agamst roll 9. Alower felt apron 11 passes over a roller 12 and between press rolls 7and 8, and thus asthe paper web is fed to the press rolls it is heldbetween the felt aprons 5 and 11. As shown, the lower press roll 8 is ofthe suction type, and as the pa er web 4 passes over lower to press roll8, it is also sub'ected to a blast of compressed air supplied y suitablemeans,

such as a pipe 13 having perforations 14 therein directed toward the paer web. The suction of roll 8 and the air assist in the operation ofextracting water or moisture from the web, and preferably the roll 12 isalso made of the suction type, and an air blast employed in connectiontherewith, as by means of a pipe 15, similar m to the pipe 13 previouslydescribed.

The amount of moisture which can be drawn from the aper web when thelatter is held between elt aprons, or the rate at which moisture can bewithdrawn therefrom, is necessarily limited owing to the fact thatthefelt aprons are not of such open texture as to permit the free andunimpeded passage of the air blast therethrou h. According to thepresent inven- 834 tion, subject the paper web to the action of an airblast at a time when the web is 4 still carried by the forming wire 1,the meshes or interstices of the forming wire being relatively large oropen, and permitting a relatively free passage of the air blasttherethrough. As shown, this air blast is supplied by means of a pipe16, similar to the pipe 13 previously described, the pipe 16 beingpreferably located underneath and directing the air blast upwardlythrough the forming wire 1.

I also prefer to subject the paper web to the air blast passing throughthe forming wire, at a time when the opposite surfaces $5 of the web areadequately supported. The paper fibers may be easily displaced in thestage at which they are carried b p the forming wire, but if supportedby t e forming wire on one side, and also properly supported onv theother side, t e. danger is avoided that the air blast might blow thefibers out of position. In the resent instance, the pipe 16, which supp'es the air last serve to as i web a, W 7

blast as above-mentioned, is positioned beneath the upper couch roll 6,and thus the paper web 4 is supported on its upper side y felt apron 5to prevent the 8.11 'blast from blowing the fibers out of position, asabove-mentioned. Preferably the upper couch roll 6 is of the suctiontype to cooperate with the air blast pipe in extracting more moisturefrom the web.

Furthermore, if felt a ron 5 be employed to carry the paper we alongfrom the couch rolls, as is the case with the machine illustrated, theaction of the air blast from pipe 16 also makes it more certain that theweb will separate from the forming wire and adhere properly to the feltapron when the latter passes away from the forming wire.

In some instances, particularly where the machine is bein used for themanufacture of papers of lig t weight, the extraction of water from thenewl formed paper web when carried b the orming wire, in conjunctionwith t e further ste of removing water from the web and both feltaprons, by means of the suction roll 12 in combination with the airblast issuing from pipe 16, will render unnecessary the use of a lowerress roll 8 of the suction type, thus reducmg the expense of the suctionroll and the amount of power consumed in driving this part of themachine. The effect of the dry air blast upon the upper felt apron 5 isto make this felt apron relatively dry, and when the two felt apronspass between press rolls 7 and 8, the blotting or absorptive propertiesof the felt aprons are sufficient to take up the necessary amount ofwater remaining in a paper web of light weight, even though lain pressrolls be employed, and the machme run at high speed.

While a s ecific embodiment of the invention has been described, it willbe obvious that many changes may be made therein without departing fromits princi-' ple, as defined in t e following claims.

I claim: 7

1. The method of making pa er which comprises forming a paper we memberhaving relatively large openings therein, directing an air blast throughthe openings in said member and on to the web to remove moisturetherefrom, and maintaining a supporting surface in engagement with theside of the web opposite to the side which engages the formmg member toprevent the blast from imparting movement to the web as a whole, at thetime when the air blast is bein applied thereto, and later removing thewe from the forming wire.

2. The method of making pa er which comprises forming a paper we upon aformin wire, maintaining an n per felt apron in contact with the side 0the webopposite to the side which engages the formupon a ing wire, andpassing a blast of air through the forming wire to the paper web whilethe latter is held between the forming wire and the felt apron.

3. A paper making machine comprising a member having openings thereinand adapted to form a web of paper upon its surface, a supporting meansfor the web adapted to enga e the same on the side thereof opposite romthe forming wire to prevent the blast from imparting movement to the webas a whole, means for projecting an air blast through the forming memberand toward said supporting means, said supporting means acting later toremove the web from the forming member.

4. A paper making machine comprising a forming wire, a felt apronpassing over the surface of said forming wire, and means disposedbeneath said forming wire adapted to project an air blast upwardlythrough the forming wire, and against said felt apron.

5. Apaper making machine comprising a forming wire, a lower couch rollassociated therewith, an upper couch roll located in advance of saidlower couch roll, a felt apron passing around said upper couch roll andover said forming wire and lower couch roll, and means disposed beneaththe forming wire and said upper couch roll for projecting-an air blastupwardly through the forming wire toward the upper couch roll.

6. The combination set forth in claim 5, wherein said upper couch rollis of the suction type.

7. A paper making machine comprising a couch roll, a forming wirepassing over the same, and means located in advance of the couch rollfor directing an air blast upwardly through said forming wire fromunderneath.

8. The method of making paper which comprises forming a paper web upon amember having relatively large openings therein, maintaining an upperfelt apron in contact with the exposed side of the web, leading the webbetween the upper felt apron and a lower felt apron to press rolls, andremoving water by passing an air blast through the web while the latteris held between the forming member and the felt apron, and alsosubjectin the paper web and the upper-and lower felt aprons to an airblast in advance of the ress rolls.

9. The combination set orth in claim 5 together with press rolls, alower felt apron adapted to cooperate with said upper felt apron to leadthe paper web through the press rolls, and means in advance of the pressrolls for subjecting both of said felt aprons to an air blast.

10. The method of making aper which comprises forming a paper web,leading a felt apron into contact with one side'of the memes web,extrscting Water from said web and side of said first-mentioned feltapron by applying an air blast m the exposed side 0f the Web, leadingthe Web between said felt apron and another felt apron. t0 press rolls,and removing further Water from. both of said ebb aprons and Web byapplying a, further bless 1110 the exposed apron.

in sestimeny that I claim the have hereunto set my hard this March 1922.

felt apron tewsrd the Web and the remaining felt 31st day of JQHN DoTUMPKINS.

